The Pathogenesis of Radial Ray Deficiency in Thrombocytopenia-Absent Radius (TAR) Syndrome.
نویسنده
چکیده
The genetic basis of thrombocytopenia-absent radius (TAR) syndrome was recently identified to be related to the RBM8A gene. The encoded protein (known as the Y14 protein) is widely expressed in human cells (including osteoblasts) and plays several essential intracellular functions. Hence, the pathogenesis of radial ray deficiency in thrombocytopeniaabsent radius syndrome remains a mystery. The current paper reviews the pathogenesis of the clinical features of thrombocytopenia-absent radius syndrome and offers a hypothesis of pathogenesis through attenuation of the Fibroblast Growth Factor 8 signal in the mesoderm because of an increased degradation of the Fibroblast Growth Factor Receptor 1.
منابع مشابه
Prenatal diagnosis of thrombocytopenia-absent radius syndrome.
Thrombocytopenia-absent radius (TAR) syndrome is an autosomal-recessive disorder characterized by a thrombocytopenia and a bilateral radial aplasia with normal thumbs. Only TAR syndrome, out of diseases which may present with radial aplasia, typically has normal thumbs. The prenatal diagnosis is rarely made. We report two observations of TAR syndrome diagnosed in utero in the sibling. The malpo...
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TAR syndrome (thrombocytopenia-Absent Radii) is characterised by the neonatal onset thrombocytopenia and bilateral absence or hypoplasia of the radii with normal organs. This syndrome is a rare hereditary condition with a recessive autosomal character. During the first months of life, prognosis is related to the severity of hemorrhage. This paper focuses on three infants who suffered from T...
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The prenatal diagnosis of thrombocytopeniaabsent radius (TAR) syndrome by ultrasound is established. The sonographic findings showed bilateral absence of the radii and club hands with normal thumbs and metacarpals. Thrombocytopenia was identified from the postabortal cord blood. Three-dimensional computerized tomography images confirmed the sonographic diagnosis. This report, to our knowledge, ...
متن کاملThrombocytopenia-absent radius syndrome: a clinical genetic study.
The thrombocytopenia-absent radius (TAR) syndrome is a congenital malformation syndrome characterised by bilateral absence of the radii and a thrombocytopenia. The lower limbs, gastrointestinal, cardiovascular, and other systems may also be involved. Shaw and Oliver in 1959 were the first to describe this condition, but it was Hall et al in 1969 who reported the first major series of patients. ...
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ورودعنوان ژورنال:
- Journal of the College of Physicians and Surgeons--Pakistan : JCPSP
دوره 26 11 شماره
صفحات -
تاریخ انتشار 2016